As reported by Censor.NET referring to UN press service, this was stated by British Ambassador to the United Nations Matthew Rycroft at the UN Security Council meeting on the situation in Ukraine.
The ceasefire was the bedrock of the Minsk agreements, he said, adding that much of the responsibility for violations fell squarely at the door of Russian-backed separatists.
Continuing support from the Russian Federation had sustained instability in eastern Ukraine, where humanitarian convoys crossed the border without inspection. The Russian Federation's influence could help to end the madness, Rycroft noted, calling on the country to bring the separatists to heel, allow unhindered access for the Monitoring Mission and enable humanitarian organizations to enter separatist-held areas
Speaking of Crimea, the British representative remarked that the human rights situation in the peninsula was worsening, with the Tatar community particularly affected. Through its actions in that enclave and its support for separatists there, "Russia has brought chaos to Ukraine", the ambassador said, calling on that country to fulfill its Minsk commitments and enable Ukraine to regain control of its sovereign territory, which could happen only with a ceasefire in place.